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Related Experiment Video

Updated: May 30, 2025

Visualization of Cortical Modules in Flattened Mammalian Cortices

Visualization of Cortical Modules in Flattened Mammalian Cortices

Published on: January 22, 2018

Relationship between functional structures and horizontal connections in macaque inferior temporal cortex.

Danling Hu^1,2,3, Takayuki Sato^4,5, Kathleen S Rockland⁶

¹Department of Neurosurgery of the Second Affiliated Hospital, Interdisciplinary Institute of Neuroscience and Technology, School of Medicine, Zhejiang University, Hangzhou, China.

Scientific Reports

|January 27, 2025

Summary

Horizontal connections in the anterior inferior temporal cortex (ITC) integrate visual information for object recognition. Unlike early visual areas, these connections show diverse functional organization, not just linking similar selectivities.

Keywords:

Anterograde tracer Intrinsic connections Intrinsic signal optical imaging Monkey Non-human primate

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Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

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Area of Science:

Neuroscience
Visual Perception
Cognitive Neuroscience

Background:

Horizontal connections in the anterior inferior temporal cortex (ITC) are crucial for object recognition.
Their role involves integrating information across functional columns, but their precise organization is not well understood.

Purpose of the Study:

To investigate the functional organization of horizontal connections in the macaque anterior ITC.
To determine the relationship between stimulus-response maps and horizontal axon terminal patterns.

Main Methods:

Combined optical imaging, electrophysiological recording, and anatomical tracing in macaque monkeys.
Mapped stimulus-response properties and analyzed patterns of horizontal axon terminals.

Main Results:

Horizontal connections in anterior ITC do not exhibit strict 'like-to-like' connectivity.
Axon terminals connected to regions with varying, not just similar, object selectivity compared to the injection site.
Some connections showed shared visual feature responsiveness, while others connected dissimilar regions.

Conclusions:

Horizontal connections in the anterior ITC display diverse functional connectivity.
This diverse connectivity likely supports flexible integration of visual information for complex object recognition.